Removed duplicated code

htdocs/admin/agenda_other.php

htdocs/admin/barcode.php

htdocs/admin/commande.php

htdocs/admin/contract.php

htdocs/admin/expedition.php

htdocs/admin/expensereport.php

htdocs/admin/facture.php

htdocs/admin/fichinter.php

htdocs/admin/livraison.php

htdocs/admin/propal.php

htdocs/admin/supplier_payment.php

htdocs/admin/supplier_proposal.php

htdocs/admin/user.php

htdocs/admin/usergroup.php

htdocs/core/actions_setmoduleoptions.inc.php

htdocs/core/lib/files.lib.php

...modules/contract/doc/doc_generic_contract_odt.modules.php

htdocs/langs/en_US/admin.lang

htdocs/modulebuilder/template/admin/setup.php

htdocs/product/admin/product.php